docs: def formfield_for_foreignkey(self, db_field, *args, **kwargs):
          """
          Update queryset for ``layout`` field.
          """
          formfield = super(FluentLayoutsMixin, self).formfield_for_foreignkey(
              db_field, *args, **kwargs)
          if db_field.name == 'layout':
              formfield.queryset = formfield.queryset.for_model(self.model)
          return formfield